Hydraulic beam truck



April 28, 1936 aw. KRETzscHM/R 2,038,660

HYDRAULIC BEAM TRUCK Filed July l, 1935 Patented Apr. 2s, 1936 Y i i Y' -Y Y 2,0."l8,660`

UNITED STATES PATENT OFFICE 2,038,660 HYDRAULIC BEAM TRUCK George W. Kretzschmar, Garfield, N. J. Application July 1, 1935, Serial No. 29,349 l* 9 Claims. (Cl. 254-2) The present invention relates to hydraulic warp beam slightly at the ends so that the trunbeam trucks and more particularly to -a form nions or supports may be readily rocked into of hydraulic truck particularly designed for the place in the supports or bearings in the let-olf r inserting and removing of warp beams into and mechanism designed to receive the said trunfrom the feeder mechanism of a loom. nions.

In the modern textile mill in which looms are With these and other objects in view, the inused in Weaving, particularly in connection with vention comprises the various features hereinthe Weaving of artificial silk, the warp beams after more fully described and particularly dewhich are used weigh, When loaded with the arfined in the claims.

l0 ticial silk, from about 800. to 1,000 pounds Y The preferred form of the invention is illus- 10 and frequently weigh as much as 1500 pounds trated in the drawing, in which: j or more. In view of the fact that the looms Fig. 1 is a view in perspective showing a porare placed close together in a plant in order tion of a let-off mechanism for a 'loom and a to economize space it is necessary that these warp'beam held by the support member of the warp beams be handled and put into place V with hydraulic beam truck, the warp beam being 15 about a foot clearance on each side and there is shown in place in the bearings withl the locking insufficient room for more than two persons to or latching mechanism lowered out of latching lift these warp beams and to put them in place position to permit removal of the beam from the on the feeder mechanism. device; i

I-Ieretofore the inserting and removal of these Fig. 2 is a sectional view in elevation at the 20 warp beams has been accomplished by two men, mid-section of the truckv showing the operati one on each side of the beam and serious strains ing piston-cylinder .units located in the same verand injury to the men frequently occur, due to tical plane as the axle ofthe supporting wheels,

' the extreme weight handled. The fact that such the supporting member or cradle being shown warp beams are being made in increasing sizes in its lowered position; Y J 25 renders it unsafe to handle the beams manual- Fig. 3 is an end view of the truck in which ly and necessitates a change in the system of the parts are in the position indicated in Fig. 2; inserting and removing the beams from the feedand y v ing mechanisms. Fig. 4 is a detailed sectional view takenA on One object of the present invention is to prothe section line 4 4 of Fig. 2, showing the de- 30 vide a form of hydraulic truck which may be tailed construction of the hydraulic mechanism employed for the handling of such warp beams by which the device is operated, the supporting and particularly for putting the weighted warp member being indicated in the partially elevated beams in place in the let-off mechanism whereposition. I Y

by one man alone may handle the beam without Referring more in detail to the drawing, the 35 difficulty. numeral 2 indicates a hydraulic truck having a Another object of the invention is to provide cradle or supporting member 4 of circular cross a form of hydraulic beam truck which will ocsection, being in the form of a section of a cylcupy a minimum of space so as to be adapted inder by meansrof which any commercial size for the handling of warp beams on every type of of Warp beam may be carried. The cradlel or 40 let-off mechanism now on the market and which supporting member is preferably carried on an is designed in a manner so that it is self-adextensible telescoping standard Gvcomprising a justing, whereby as the beam support is lowseries or piston-cylinder units, the said units bel ered it will swing into the longitudinal position, ing located in the same Vertical plane as the.v

4 5 that is, lengthwise of the truck, in which posiaxes of the supporting wheels hereinafter re-.45

tion the beam is most readily handled without ferred to. danger of interference or contact with looms or The truck is shown in Fig. las supporting a other machinery rdistributed over the floor area warp beam 8 in the let-off mechanism I0, this in the plant. mechanism having the usual whip roll I2 and a A further object of the invention is to prolocking mechanism I4 for holding the warp beam 50 vide a form of vmechanism adapted tomaintain in place, the locking mechanismV being indicated and support the beam about its center of gravin the open or unlocked position, in which posiity, the mechanism being so designed that the tion the warp beam may be inserted or removed beam may be elevated readily to the desired from the let-off mechanism.

elevation and permit controlled rocking of the The truck member is preferably constructed 55 l:having a body casting I6, as'indicated, having Vflanged members I8 and I9 which extend downwardly and laterally from the body portion .of

the truck leaving a space on each side between the said body 'portion and thev flanges for the Ysupporting wheels 20, 22 which are protected by means of the flanged members. In order to obtain ease of operation of the truck, the wheels are preferably provided with roller bearings 2|, 23 and resilient tire members 24, 26, which are Y preferably of rubber.

Theqbody portion of the truck is preferably provided with ways or laterally inclined face portions. 28 and 38 to permit proper seating of the cradle or support member, andthe support member 4 is also provided with similarly inclined face portions 32 and 34, so that as the supporting member or cradle is lowered,f the advanced edges 36 and 38 will strike some portion. ofthe inclined surfaces 28 and 30, thus rotating' the cradle and guiding it into position as it is lowered into place.

-.,At ih e forward and fear eiidsfthe truck isV provided with stop members 40, 42adapted to limit rockingmovement lof thejtruck about the Y'supporting Wheels" asV an axis. The stop mem- Y of the trucl so as to` permitirockingY movement bers are preferably wheelspositioned centrally 'atthevjo'rwardnand rear 'ends oithe truck and are-positioned ad short distance',` from the door or supporting plane in vthe horizontalyposition or oscillation'aboutithe aXle of wheels 2li` and22 as an axis. These `wheelspr'stop members 4S andi 42 -are valso preferably provided withgrubber tiresand'with balljbearings inorder t@ lielduce friction thereof toajminimum.

I' 7base plate or'h using member Yi4 isprefably Positioned as 19W. asppssible on the truck bQdrSg as :tp provide, a' spmcientvoiume for holding the hydraulic operating uid. Thebase plate is prpfprpblylfprrned having theepd portions inclined, prpizvard1r.v ,the puddle portante- Y ing elevateda short d istanejaboye thdifloorgor SuPPQnap1app-- l'hzpndporuons Auand 4a are preferablyupwardly,inclined at, an angle of l about 20v degrees so that as thetruck S.Sup-ported onA one at ,itsV forward wheels 130,01 T42 -.onthe ihrer.. roiptsppport including .the two .wheelsz and- 22,Y -the housing 'member will not Ycontact Within@ 119911.; m.

Y is prgfprpplrpppratpd througha pump mecha.-

peri 56-;havnepttaphed,:thereto a. piston fmem- 5.? Y@Eline within the.Y cylinder L64 and. the. icylinder r 41. beingjjn Yturn l provided'.A with the.A piston `The series o'f piston cylinder units are hydraulicallywoperated, through a .l series of. valves and.' passages, bymineans,V of. which the, hydraulic operating fluid1 mayV be. pumped, from the resermember 56 vitting within the cylinder 68 provideding 12 having the usual closure means Vlll which may be screwed into place.

The pumping member 54 is preferably connected through a slotted lever 1S to a piston member 18, a pin member 8!) being slidably held in the slot82 to permit .axial movement of the piston 'i8 in the cylinder 84,

As the piston member 18 is raised in position, oil from the reservoir '18 passes up through the passageway BS raising a ball valve 88 from its seat, whereby the oil passes. into a passageway into Ythecylinder member till. As the piston member 'i8 is 'forced downwardly, the cup member 98 forces the oil downwardly through the I:passage 83 so that the ball Valve 88 is seated, ,closing thepassage S5 and forcing the oil into the passageway 92, the ballrvalve 94 which is Y yspring pressedto its seat'by means of a spring member Sii, being/raised from its seat whereby the Y oil passes into the passageway 98, from Whencerit passes into the lowerinost cylinder B8 and passes upwardly throughthe .opening ll in: the piston memberandropeningin piston Y memben 52 Yuntil it contacts. thecup .mem-

ber 5g ofthe piston 58.

In the raising operation, the large cylinder 84 is mo-vedupwardly first throughltne pressure of j 'the oil in cylinder 63 ag'ainstthe large area of the pistonrni'ember andthe cup. member Eil, the cylinder 64 movingV upwardly until it reaches its uppermost'position, as shown in Figli of rthe drawing. .The voil v'.then' ll'iassesthrough the 64,. fore# Y Y opening 'i l'into the interior of` cylinder Y ingV the pistonvfi and cup. member 63 attached thereto upwardly, whereby t-lie., cylinder 6D is raised until thepisto'n` mernberl52.v contacts with the uppeninterior surfaceof .the large. cylinder Eil. Oil thenpassesthrough the opening itinto the intleriorportionio'fcylinder 6U,..forcin'g the piston'member 58 and cupmember 5S attached piston 58.V contacts with 'the topr of .the .cylinder 68.'

,.Itis obvious .thatthe member 56 and the` cradle memberl filare elevatedtlirough the successive, positionsly by the; continuous pumping fof the piston .cylinder unit 18, S4 by means offfthe handle ,member 58,.

moves ,intdengagementlwith -the rod member 40 thereto.. upwardly in, the,r cylinder iuuntil 'theV ,f

:il: Y

HB2 whic-hmoves.downvizardly` against vthe action Y of V,the springll moving theloall .memberii from. itsseat against. the. actionrof:.the spring M38Y wherebythe hydraulic..uid vflows rback tol 'the reservoir past .the -ball. m5 and .the piston cylinder units collapse, the upper piston 58movingdownwardly in .the cylinder 50 rst; the lcylV` indenii thenmoving down intofcylind'er' 64 and cylinder` llbeing thenretractedintoits lower'-Y mostposition into-.the cylinder {iii-in the-hous-V ing ,of .thatriiok4` I The speed of lowering the'cradle( 4 with a beam or roll thereon may be regulated Yby the size'pf. the outletof the-release valve-|02.; y

It wilLbeumderstood that-the lifting and lowering. of thecradlevli is accomplished. by means of .the same handle 50 vand it will be obvious zthat the device, may be operated orworked by a single operator, one handrbeing used for operating the r' pump handlei fwhile the Yother hand is'used for .steeringor controlling the beam orload which is Vbeing putfintofr'nlace.4 H

,. `It willibefunderstood that any preferred formV of Y,construction-.Y may be vemployed in connectionY 2,038,660 with the piston cylinder units for elevating and loweringthe support member 4, 'althoughI preifer the construction as shown in the drawing in which the piston units 58, 62, and 66 which fit within the Vrespective cylinders 60, 64, and 68 have a suiiicient length so as to serve as a guide in the movement'of the pistons in the cylinders and to provide a sufliciently rigid support so that if a warp beam or other load should be voif center on the cradle 4, the piston cylinder units would be able to carry the unbalanced load without danger of breaking or causing binding of the piston cylinder units.

During the downward movement of the cylinders, the oil flows from the cylinders through the passageway 98 then past they ball valve |06 and into the passage ll which communicates through a passageway H2 directly with the reservoir lll, whereby the oil iiows back into the reservoir.

It will be understood that 'in the operation of this device by the use of telescoping cylinders, as described, a much higher lift may be obtained than by the use of-hydraulic jacks or trucks of the form heretofore used in which toggles are employed to obtain a lift of from about four to six inches. It will be obvious that by the form of device above described and illustrated in the drawing a very wide range of lifts may be obtained without the limitations which are imposed on devices in which toggles are used, these devices being limited by the minimum height represented by the closed position of the toggles.

It is obvious furthermore that in the form of device above described, the power transmitted to the piston cylinder units may begradually applied, whereas in the use of toggles the leverage varies with the changing positions of the toggle levers during ascent or descent.

It will be understood furthermore, that the method of mounting of the cradle upon piston cylinder units as above described permits rotation of the cradle to any desired extent without interfering with lthe operation of the lifting device. As soon as the cradle 4 leaves the ways 28, 3B, either the truck or the beam may be revolved to any position. The truck and the beam may be positioned, for example, to form an angle of 90 between the longitudinal axis of the truck and the longitudinal axis of the cradle. 'I'his position is obviously the natural position for riding a beam into place in the loom bearings, although after the beam has been put into place, the truck body `may again be turned intoY the position in which the longitudinal axes are parallel with each other as indicated in Fig. 1 of the drawing, in which position the truck may be readily withdrawn.

While this invention has been described as particularly applied to warp beams for the insertion of such beams into the feeder mechanism of a loom, it is obvious that it may be applied to place or remove beams in entering, beaming, sizing, twisting-in machines and for various other uses in the textile industry.

It will be obvious also that the form of the invention which has been described is particularly adapted for use in paper mills, and in connection with textile dyeing and nishing plants, and in fact for any use in which rolls of material are handled from one lift to another, or to a rack or to various other devices. In connection with the paper mill industry, for example, in which paper rolls weighing 3,000 pounds or more are to be handled, a hydraulic lifting truck of the form 'above described is particularly advantageous in view ofthe diiculties encountered in such mills with the present system for handling such large rolls.

While the invention has been illustrated and described in its preferred form, it will be obvious to those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention or from theV scope of the annexed claims.

Having thus described the invention, what is claimed las new is:

l. A hydraulic beam truck comprising a supporting member for supporting wheels in axial alignment permitting rocking of the truck forwardly and rearwardly of the said wheels, a series of aligned telescoping piston cylinder units the axes of which are in the vertical. plane including the a housing comprising a reservoir communicating with said cylinders, a kpumping means for operating the said piston cylinder units to expand the same into the uppermost position, means for of the said supporting wheels, .l

releasing the hydraulic medium so as to bypass directly to the reservoir to permit rapid lowering of the said supporting member and stop means to limit the angular pivotal movement or rocking of the said truck on both sides of the said vertical plane including the said axis.

2. A hydraulic truck particularly adapted for inserting and removingwarp beams into and from a let-off mechanism which comprises a supporting member in the form of a portion of a cylindrical surface for receiving a Warp beam, a housing Y member providing a reservoir, supporting wheels for the truck carrying said housing member, a Vliange member extending outwardly and downwardly fromV the housing member so as to shield the said supporting wheels, means for elevating and lowering the said support comprising a series of aligned telescoping piston cylinder units, the axis of which units is midway between said supporting wheels, a pump for operating the said piston cylinder units to progressively expand the same so 4as to lift the said support into its uppermost position, valve means for releasing the hydraulic medium from thepiston cylinder units to return the same to the reservoir and to permitrapid lowering of the` said supporting member and means for angularly guiding the said supporting member in its downward movement so as to return the said supporting member into aligned collapsed position of the mechanism.

3. A hydraulic truck particularly adapted for inserting and removing warp beams into and from a let-olf mechanism which comprises a supporting member in the form of a portion of a cylindrical surface for receiving a warp beam, a housing member providing a reservoir, supporting wheels for the truck carrying said housing member, a flange member extending outwardly and downwardly from the housing member so as to shield the said supporting wheels, means for elevating and lowering the said support comprising a series of aligned telescoping piston cylinder units the axis of which units is midway between said supporting wheels, a pump for operating the said piston cylinder units to progressively expand the same so as to lift the said support into its uppermost position, valve means forV releasing the hydraulic medium from the piston cylinder units to return the same to the reservoir and to permit rapid lowering of the said supporting member, means for angularly guiding the said supporting member in its downward ,Increment .S-as .t0 return rthe said ,supper-tins iezberinto angnee'hbi1apsed posingn ,of the 'mechanism andstpmeans forwardly lvgaukkidfto the rear of said supportingwheelspositioned so as VYto ,permit 4pivotal .movement of ,thestruclr about the axles bf the `said supporting wheels @5 @il Y vaxis,`the positionof ,said stops 4preventing ensagement Vof other parts of theitruck with v,the

Y ment for supporting said base member and permitting rocking movementthereof on `both sides vof the axis of the ysaid wheels, a pump and pumping mechanism for raising said piston-cylinder units and for releasing the .same to lowered position, a reservoir connected to said pump for furnishing fluid to operate said piston-cylinder units and means for mounting said base member to allow relative rotary movement between the said cradle and the said base member, there-Y by permitting adjustment of the part by movement of the. base member While the said part is Ybeing held by said cradle. Y

5. In a hydraulic truck, a cradle member for holding a part to be manipulated, a base member,'a series of concentricY piston-cylinder units connecting said cradle/with said base member,

supporting wheels on'saidbase member so disposed with reference to said piston-cylinder units that the longitudinal axis oi saidunits crosses the axis of the said wheels, and guide Y means whereby the said cradle in its lowering move-ment will be brought into alignment with said base member so'that the longitudinal axis Y of the cradle and that of the base memberrwill lie in Asubstantially the same plane.

6 Ina hydraulic truck, a cradlemember'for holding a part to be manipulated, Va base member, a series of concentricpiston-cylinder*units connecting said cradle with said base member,

V and guide means on the said ycradlefa'nd*` on the said base member so that in the said jacl,v lowering movement of' thecradle will be brought into alignment with the said base member.

r7. In a hydraulic jack, a cradle for holding "i the part to be lifted, a 4base member, supporting wheels mounted on said base member'to permit rocking of the base member about the axles of the wheels asian axis. a vseries of concen'tricY piswheels.

ton-cylinder units connected to said Ycradle and .mounted ,on vSmid ,base member, va pump and ,pumping 4meclfianism @for raising said piston-cyl,-

indergunits, alreservoir connected to said pump lfor wurnishlngV fluid Vto operate said piston-cyllinde units., :means for releasing the said fluid to i .wardly and rearwardly of the said supporting I -n Ma hydraulic jack, a cradle for 4holding the part to vbe lifted, a base member including a truck mounting, a VVseries of .concentric piston cylinder units connecting said cradle` to base member, ,a pump and pumping mechanism Vfor Qpcrating said piston-cylinder 1in-its, VI neans, for @leasing the ,Said uni-ts into lowered posit-ion,

wheels mounted .on said truck in alignment with said piston-cylinder units to rpermit relative ro.-

ftaf- Y @OY- ement between .the said .Cradle and the said base member and means for guiding the said cradledurfing its l'iweringv movement whereby when-the said cradle is brought within a certain range of its longitudinal position in the truck it will be guided mechanicallyinto place.

9.111 a hydraulic truck, a cradle Vmember for holding a part to be manipulated, a base member, aseries of concentric piston-cylinder'units of `progressively varying size connecting Ysaid ycradle with said base member, thesmallest unit being connected to the cradle and the largest unit beingY connected to the base member, supporting wheels in axial alignment on said base member disposed directly under the said piston-cylinder units so as to permit rocking movement of Vthe truck forwardly ,and rearwardly about the wheels as. a pivot, guide Wheels on the 'Said Ybase meinber to permit limited rocking movement of the truck wherebythe said cradle may-be raised `or lowered at one'end so that the part carried by the cradle may be broughtI into alignment with the bearings orpart into which the warp beam i or other device is to be inserted, the said construction permittingY aiV single operator to -frullyv control Vthe movement fied thereby @degeneration- GEO., W.

Q f the truck and part cerf' 

